Rod-packing.



PATENTED OCT. 4, 1904.

A. W. KRIEGER.

ROD PACKING.

.APPLIOATION FILED PEB.8,1904.

N0 MODEL.

UNITED T STATES Patented October 4;, 1904.

PATENT OFFICE.

' ROD-PACKING.

SPECIFICATION forming part of Letters Patent No. 771,430, dated October 4, 1904. Application filed February 8, 1904. Serial No. 192,625. (No model.)

To all whom/it may concern:

Be it known that I, ALFRED 1V. KRIEGER,

a citizen of the United States, residing at Las Vegas, in the county of San Miguel and Ter- 5 ritory of New Mexico, have invented a new and useful Piston-Packing, of which the following is a specification. 1

This invention relates to an improved rodpacking for steamengines and other machines, and has for its object to provide an inexpensive, durable, and efiicientpacking of this character in which the pressurev of the steam on the packing rings or segments forces the latter in contact with the rod, and thereby maintains a steam-tight joint under all conditions.

A-further object of the invention is to pro I as to permit any individual section to be readily removed and replaced when worn or broken.

The invention consists in the construction and novel combination and arrangement of parts hereinafter fully described, illustrated in the accompanying drawings, and pointed out in the claims hereto appended, it being understood that various changes in form, pro- -portion, and minor details of construction may be resorted to Without departing from the principle or sacrificing any of the advantages of this invention.

In the accompanying drawings, forming a part of this specification, Figure 1 is a front elevation, partly in section, of a portion of an engine-cylinder, showing my improved rodpacking in position thereon. Fig. 2 is a longitudinal sectional view. Fig. 3 is a detail and encircling the piston-rod 11 is a cylindrical casing 12, the inner walls of which are squared to form a plurality of angular faces 18, preferably eight in number, asshown. Seated within the squared portion of the casing 12 are a series of packing rings or segments 14:, each ring being preferably formed in two sections 15 and 16, having their inner faces curved to conform to the shape of the piston and arranged to break joints with each other, as shown. The adjacent edges of the sections comprising the packing-rings are spaced a short distance apart, as indicated at 17, so as to permit said sections to be forced in contact with the piston by the pressure of the steam within the cylinder, and thereby take up any wear on said sections incident to friction between the parts. One end of the cylindrical casing 12 rests against a bearing-collar 18, arranged within the gland 7 and engaging the front wall thereof, while a companion collar 19, provided with an annular shoulder 20, bears against the opposite end of the casing, said collars being adapted to prevent longitudinal displacement of the packing-segments within the casing and also serving to keep the casing in the proper position with the gland 7.

Arranged within the steam-chamber 6 and surrounding the rod 11 is a preferably coilspring 21, one end of which engages the annular shoulder 20 and the opposite end thereof a back ring 22, the pressure of the spring on the collar 19 being sufficient to keep the several parts comprising the packing in their proper relative position.

A series of openings or steam-passages 23 are formed in the walls of the casing 12, said openings being so disposed that the expansive force of the steam from the cylinder will be uniformly exerted on the angular faces of the packing rings or segments, thereby forcing the same in contact with the piston-rod and insuringa steam-tight joint at all times. The

. steam is admitted from the engine-cylinder to the chamber 6 through suitable openings 2% and thence to the gland 7 and through the openings 23 in the cylindrical casing 12 to the packing rings or segments. As the bearing-faces of the sections comprisingthe segments becomeworn from constant use the effectiveness of the packing will not be impaired, inasmuch as the space between the adjacent faces of the sections will permit the latter to be forced inwardly toward each other, and thereby compensate for any wear on the parts.

By having the cylindrical casing, bearingcollars, and packing-rings formed in separate sections any particular section may be readily removed when broken and replaced at a small cost, while by having the sectional packing rings or segments arranged to break joint with each other it causes a uniform pressure to be exerted at all points on the piston-rod and effectually prevents the leakage of steam.

Having thus described the invention, what is claimed is 1. In a rod-packing, the combination with a casing having interior angular walls provided With peripheral openings for the passage of steam, and a plurality of sectional packing-rings having corresponding exterior angular walls fitting within the casing and arranged to break joint with each other.

2. In a rod-packing, the combination with a casing having interior angular walls provided with peripheral openings for the passage of steam, a plurality of sectional packing-rings having corresponding exterior angular walls fitting within the casing and arranged to break joint with each other, and removable bearing-collars engaging the opposite ends of the casing and serving to retain the paeking-rings within the casing.

3. In a rod-packing, the combination with a casing having interior angular Walls provided with peripheral openings for the passage of steam, and a plurality of sectional packing-rings having corresponding exterior angular walls fitting within the casing and arranged to break joint with each other, the sections of each packing-ring having their adjacent edges spaced apart to thereby permit outward movement of said sections within the casing.

a. In a rod-packing, the combination with a stuffing-box and gland, of a piston-rod, a casing having interior angular walls provided with peripheral openings for the passage of steam arranged within the gland and surrounding the pistonrod, a plurality of sectional packing-rings having corresponding exterior angular walls fitting Within the casing, a bearing-collar interposed between the gland and the forward end of the casing, a second collar engaging the rear end of the casing, and a spring arranged Within the stufiing-box and engaging the second collar for preventing longitudinal movement of the casing Within the gland.

5. In a rod-packing, the combination with a stuffing-box and gland, of a piston-rod, a casing having octagonal interior walls arranged within the gland and surrounding the piston, a plurality of packingrings each formed in two sections having their adjacent edges spaced apart fitting within the casing, said sections being provided with corresponding exterior-octagonal Walls and arranged to break joint with each other, there being peripheral steam-passages formed in the walls of the casing communicating with the sectional packing-rings.

6. The combination with a cylinder-head provided With a stufiing-box, of a piston-rod, a gland secured to the cylinder-head, a gasket interposed between the gland and said cylinder-head, a casing having octagonal interior walls provided with peripheral openings for the passage of steam arranged Within the gland and surrounding the piston, a pair of sectional packing-rings provided With corresponding exterior octagonal walls fitting within the easing and having their adjacent edges spaced apart, a bearing-collar engaging the front and rear ends of the casing, a back ring bearing against the cylinder-head,'and a coil-spring surrounding the piston-rod and interposed between the collar on the rear end of the casing and the back ring.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two witnesses.

ALFRED W. KRIEGER.

Witnesses:

WM. Gr. HAYDON, M. GREENBERGER. 

